Second: Operational
function upgrade: One touch switch previous/next song & volume adjustment & wake up Siri, Android, Alexa, voice.
COOL LED SCREEN: A substantial portable device, available everywhere there are AA batteries, gives you power when you need it! Can charge most smartphones & tablets using the existing cable or original cable, while also certified safe by UL and CE Standards.
DIGITAL CHIP UPGRADE: Upgraded using the NEWEST digital optimized 5.1 Authentic Certified Bluetooth chip, with automatic boot and matching. CVC 8.0 intelligent noise reduction, enjoy HD call effects without being affected by noisy environments.
IPX4 WATERPROOF +8D BASS: Daily life waterproof, supports rainy outdoor sports and gym sweating, letting you enjoy music during sports. Enjoy the HIFI scene and immersive 8D stereo surround sound effect.
WHAT YOU GET: You will get a Portable Bluetooth Version F9 TWS earphone with a Power Pack Storage Gift box, and the charging bank headset can charge compatible with your mobile phone, iPad, or earphone at any time, making your travel and sports more exciting. Can be used as a gift for your family and friends